The quality refers to the intensity of Innate True Qi, simply put, when the Innate True Qi becomes profound enough, a qualitative change will occur, and every move will carry the tangible Innate True Qi.
Once the Innate cultivation becomes stable and the accumulation of Innate True Qi reaches a certain level, the standard metric for measuring the strength of Innate Martial Artists then becomes the intensity of their Innate True Qi.
As for the characteristics, each type of Innate True Qi possesses different traits; how to maximize the qualities of Innate True Qi also becomes one of the benchmarks for assessing the strength of Innate Martial Artists.
No need to elaborate on the application techniques, the usage of Innate True Qi is something that requires constant practice and is worth in-depth research. Mastery to manipulate it at will is just the foundation; being able to change it as one desires and reaching the Ruwei stage represents a higher level of utilizing Innate True Qi.